\myc
omma
nd{f
		irst
		argu
		ment
	}[se
		cond
		argu
		ment
	]

\beg
in{m
		yenv
	}
here
is a
line
that
cont
ains
simp
le
text
here
is a
line
that
cont
ains
simp
le
text
here
is a
line
that
cont
ains
simp
le
text
here
is a
line
that
cont
ains
simp
le
text
here
is a
line
that
cont
ains
simp
le
text
\end
{mye
	nv}
